Easy 5-second installation. Just plug and play. Virtual 7.1 Surround Sound effect with DVDs and music CD. Listen to DVD audio, CDs or MP3 files with spectacular simulated home-theater surround-sound on stereo headphones or speakers. Works with any USB port on any desktop or laptop PC. Supreme stereo output provided for connection with headphones or powered speakers to your PC or laptop. Boosts audio playback signal level and enhance listening experience. Simulated 3D audio effects with games. Enjoy realistic 3D sound effects with stereo headphones while playing multi-channel games. Provides a second audio input and output or replace the broken onboard audio for your PC. No more fumbling around the back of the computer just to switch from speakers to headphones. External audio volume/mute control by push buttons with green/red LED status indication. Powered by USB bus. No external power supply is required, so it’s convenient to carry around with your laptop.